The "only pretension, of which I am tenacious," wrote Hazlitt, "is that of being a metaphysician"; but his metaphysics, and particularly what this book identifies as his power principle, has until now been neglected. This exciting book studies Hazlitt's development of the power principle as a counter to the pleasure principle of the Utilitarians, and examines the revelation of power in his philosophy of discourse, his account of imaginative structure, his theory of genius, and his moral theory.